LookingGlass/client/displayservers/Wayland/output.c

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/**
* Looking Glass
2023-10-20 04:36:34 +00:00
* Copyright © 2017-2023 The Looking Glass Authors
* https://looking-glass.io
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc., 59
* Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "wayland.h"
#include <stdbool.h>
#include <string.h>
#include <wayland-client.h>
#include "common/debug.h"
static void outputUpdateScale(struct WaylandOutput * node)
{
wl_fixed_t original = node->scale;
if (!wlWm.useFractionalScale || !wlWm.viewporter || !node->logicalWidth)
node->scale = wl_fixed_from_int(node->scaleInt);
else
{
int32_t modeWidth = node->modeRotate ? node->modeHeight : node->modeWidth;
node->scale = wl_fixed_from_double(1.0 * modeWidth / node->logicalWidth);
}
if (original != node->scale)
waylandWindowUpdateScale();
}
static void outputGeometryHandler(void * opaque, struct wl_output * output, int32_t x, int32_t y,
int32_t physical_width, int32_t physical_height, int32_t subpixel, const char * make,
const char * model, int32_t output_transform)
{
struct WaylandOutput * node = opaque;
switch (output_transform)
{
case WL_OUTPUT_TRANSFORM_90:
case WL_OUTPUT_TRANSFORM_270:
case WL_OUTPUT_TRANSFORM_FLIPPED_90:
case WL_OUTPUT_TRANSFORM_FLIPPED_270:
node->modeRotate = true;
break;
default:
node->modeRotate = false;
}
}
static void outputModeHandler(void * opaque, struct wl_output * wl_output, uint32_t flags,
int32_t width, int32_t height, int32_t refresh)
{
if (!(flags & WL_OUTPUT_MODE_CURRENT))
return;
struct WaylandOutput * node = opaque;
node->modeWidth = width;
node->modeHeight = height;
}
static void outputDoneHandler(void * opaque, struct wl_output * output)
{
struct WaylandOutput * node = opaque;
outputUpdateScale(node);
}
static void outputScaleHandler(void * opaque, struct wl_output * output, int32_t scale)
{
struct WaylandOutput * node = opaque;
node->scaleInt = scale;
}
static const struct wl_output_listener outputListener = {
.geometry = outputGeometryHandler,
.mode = outputModeHandler,
.done = outputDoneHandler,
.scale = outputScaleHandler,
};
static void xdgOutputLogicalPositionHandler(void * opaque, struct zxdg_output_v1 * xdgOutput,
int32_t x, int32_t y)
{
// Do nothing.
}
static void xdgOutputLogicalSizeHandler(void * opaque, struct zxdg_output_v1 * xdgOutput,
int32_t width, int32_t height)
{
struct WaylandOutput * node = opaque;
node->logicalWidth = width;
node->logicalHeight = height;
}
static void xdgOutputDoneHandler(void * opaque, struct zxdg_output_v1 * xdgOutput)
{
struct WaylandOutput * node = opaque;
outputUpdateScale(node);
}
static void xdgOutputNameHandler(void * opaque, struct zxdg_output_v1 * xdgOutput, const char * name)
{
// Do nothing.
}
static void xdgOutputDescriptionHandler(void * opaque, struct zxdg_output_v1 * xdgOutput,
const char * description)
{
// Do nothing.
}
static const struct zxdg_output_v1_listener xdgOutputListener = {
.logical_position = xdgOutputLogicalPositionHandler,
.logical_size = xdgOutputLogicalSizeHandler,
.done = xdgOutputDoneHandler,
.name = xdgOutputNameHandler,
.description = xdgOutputDescriptionHandler,
};
bool waylandOutputInit(void)
{
wl_list_init(&wlWm.outputs);
return true;
}
void waylandOutputFree(void)
{
struct WaylandOutput * node;
struct WaylandOutput * temp;
wl_list_for_each_safe(node, temp, &wlWm.outputs, link)
{
if (node->version >= 3)
wl_output_release(node->output);
if (node->xdgOutput)
zxdg_output_v1_destroy(node->xdgOutput);
wl_list_remove(&node->link);
free(node);
}
}
void waylandOutputBind(uint32_t name, uint32_t version)
{
struct WaylandOutput * node = calloc(1, sizeof(struct WaylandOutput));
if (!node)
return;
if (version < 2)
{
DEBUG_WARN("wl_output version too old: expected >= 2, got %d", version);
free(node);
return;
}
node->name = name;
node->scale = 0;
node->version = version;
node->output = wl_registry_bind(wlWm.registry, name,
&wl_output_interface, version >= 3 ? 3 : 2);
if (!node->output)
{
DEBUG_ERROR("Failed to bind to wl_output %u\n", name);
free(node);
return;
}
if (wlWm.xdgOutputManager)
{
node->xdgOutput = zxdg_output_manager_v1_get_xdg_output(wlWm.xdgOutputManager, node->output);
if (node->xdgOutput)
zxdg_output_v1_add_listener(node->xdgOutput, &xdgOutputListener, node);
}
wl_output_add_listener(node->output, &outputListener, node);
wl_list_insert(&wlWm.outputs, &node->link);
}
void waylandOutputTryUnbind(uint32_t name)
{
struct WaylandOutput * node;
wl_list_for_each(node, &wlWm.outputs, link)
{
if (node->name == name)
{
if (node->version >= 3)
wl_output_release(node->output);
if (node->xdgOutput)
zxdg_output_v1_destroy(node->xdgOutput);
wl_list_remove(&node->link);
free(node);
break;
}
}
}
wl_fixed_t waylandOutputGetScale(struct wl_output * output)
{
struct WaylandOutput * node;
wl_list_for_each(node, &wlWm.outputs, link)
if (node->output == output)
return node->scale;
return 0;
}